I always wondered, why do some markets (US) list the RCF as 467hp and others (Middle east) list it as 471hp?

Any clue?

 

The most common use of HP, as a unit, is to measure the power of an engine, which you can determine by hooking it to a dynamometer. What HP actually measures, is the maximum rate of acceleration and the top speed of the car.

On the other hand, Brake Horsepower measures the HP of an engine without considering the loss in power that is caused by some parts of the engine, like the generator, gearbox, water pump and other auxiliary parts.

467HP vs 471 BHP

 

There is a third number out there as well - 477 HP

This is DIN HP (or PS). It is most commonly used in Japan and some European markets.

 

Thanks for the clarification, 471 does look nicer than 467 therefore our RCFs are faster than your RCFs

 

The fastest ones are in Japan....

 

^^^ And they get the CF hood there as well... WTH

 

Let's just be honest here folks, the US Version Ultrasonic Blue Mica 2.0 is the fastest.......LMAO!

 

You're describing RWHP, and that difference is not 4 or 10 HP man. It's usually about 15% difference, due to drivetrain losses, but varies a lot with each car. Those small differences are just different methods of measuring CRANK HP. The US method (BHP) is the least artificial, and requires using all engine accessories, plus stock intake and exhaust systems. But result is still adjusted for ideal conditions (zero elevation, perfect temperature -68ºF, I believe-, no humidity, etc). Hardly realistic.

 

Technically, RCF500 is not wrong. They use an engine dynamometer to measure the output of an engine. What you're thinking of is a chassis dynamometer. Same concept, different application.

 

Indeed; no other way to measure it. Didn't sound like he was talking about that, hence my comment. But thank you for further clarification. The difference in numbers is HOW the engine is set up. The 477 figure doesn't use a stock exhaust, including no catalytic converters, I believe. The 471 uses a non-stock exhaust manifold, but with cats, I think. All use all engine accessories and stock intake/ECU nowadays. And all correct to ideal conditions as well, just like most chassis dyno figures everywhere. I'd be nice if an expert out there could set the record straight, and point out the exact differences.

 

Easy answer. The US spec car has to take into account all of the stupid CAFE and EPA emissions garbage which puts more drag on the motor and reduces power.

Other countries don't have that garbage dragging down the motor.

 

Especially VW diesels.

 

Win

. .